$\"\"$

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The value is given by MD = 7

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MD be the radius (r) of the circle M.

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RI be the diamater(d) of the circle M.

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$\"\"$

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$\"\"$ (Multiply each side by 2)

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$\"\"$ (Substitute $\"\"$ )

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$\"\"$ (Multiply)

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$\"\"$ ( $\"\"$ ) $\"\"$

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The value of $\"\"$ .